Mixing machinery.



PATBNTED MAY 26,1908.

H. SKINNER.

MIXING MACHINERY.

APPLICATION FILED MAY 10, 1907.

1 UNITED s'rrrrns Parana orrioa;

nnnnr' sii rmrnn, or ROSHERVILLE, ENGLAND.)

Mrrinve' maonmnnr.

No. 888,542. 7 Specification of- To all whom it may concern: Be it known that L'HENRY SKINNER, engineer, a subject of the King of Great Britain, residing at Anns Villa, Beresford Road, Rosherville, in the county of Kent, England,

have invented new and useful Improvements in Mixing Machinery, of which the following is a specification. V e

For.mixing slurry and other fluids I employ a vertical revo ving cylinder open at its I ends and for the most art but not com letely immersed in the flui to be mixed. ithin the interior of the cylinder is fixed a double threaded screw and around the lower part of the outside of th'e'cylinder another double threaded. screw. One screw is made right handed and the other left handed. The outside screw drives the fluid downwards and the inside one draws it up through the open lower end'of the cylinder and discharges it from the upper end which is made bell mouthed so that the discharged slurry may fbe caused to drop back into the tank at some distance from the cylinder.

Radial bafile plates standing up from the bottom of the tank just clear of the outside screw ma also be used.

The tank may be circular and made concave at the bottom and the vertical screw cylinder be mounted in the center of the -tank or for larger sizes the tank may be of annularformswith a similar concave bottom and a number of-Yesrolving screw cylinders formed as above described-be used at e ual distances apart. The shafts ofthe cylin, ers

may also be supported by arms extending from a shaft concentric with the tank and slowly revolved. so that in addition to each cylinder being'made to revolve on its own shaft it isalso caused to travel around the annular tank.

Figure 1 is a vertical section of a mixing machine in which the vertical cylinder with 'its exterior and interior screw threads is mounted centrally within la circular tank having a concaye bottom as abosre described. Figs. 2 and'3 are vertical sectionsoithe cylindcr one showing one portion of thih iginer andlouter screw threadsand the other the other portion. Fig. 4 isa vertical sectio n showing a. pair of such revolving vertical cylinders mounted within a tank of annular form. Fig. 5 is a vertical s'ection and Fig. 6 pm side elevation of one of the vertical-cylin-. 1, 2'and3 is the tank,.*Bfthe carried within the lower Letters Patent. Patented'May 1908.

Applicationfiled May 10, 1907. Serial No. 372,884.

and D the outer screw threads. The screwder and t e screw-threads D constitute, the screw-threaded propeller of the outside of the cylinder. E E are fixed radial baffie plates.

the slurry is propelled.

be supported at opposite endsof a 'gird'er ..F'. which s capable 0 central shaft G c'oncentriowith thetank.

the girder. I I slowly round the shaft G by a pinion I carried by it gearin with a fixed toothed wheel J. The pinion and shaft H may be driven by any suitable motor carried by the central portion of the girder.

tical shaft of each revolving cylinder may be blade would not be revolved with the vertical open atfboth ends within the tank and havbottom thereof, a screw-threaded pro eller terior of the cylinder, and means for revolv- .propeller to force the liquid upwardsjtli iou the cylinder and to throw the liquidla'tera y from the upper end thereof. 1

2. In machinery for mixing li uids, the combination of a tank, a vertica .c linder and m ns'for revolving the, cylinder 111 a direction'to cause the screw-threads togfcrce the liquid upwards; through-the cyhnder and threads C constitute what I call the screw threaded ropeller for the inside of .the-cylin-:-

The arrows indicate thedirections in which a In the modification shown in Fig. F the vertical shafts of the cylinders are shown to being turned around a made to carry a loose baflle blade K}. This:

ing its lowerend a short distance above the 5 art only of t e ining the cylinder in a directiondifiiv cause the open at both ends within the tank; aving 3 its lowerend a short distance'above the bottom thereof'and havin a bell mouthed to a screw-threaded prope er carriedwjthin t e lowerpart only of: the interior of thecvlinder vertical cylinder, 0 the inner screw threads The vertioalshafts ofthe cylinders are. as; shown driven from a shaft H extend ng along The 1 girder is made to turn As seen in Fig. 6 the lower endjof the vershaft but would remain trailing behind it as the shaft was made to travelslowly around I uids, the combination of a tank, a vertiea cylinder to throw said liquid laterally from the upper combination of a tank, a central vertical end of the cylinder. a

3. In machinery, for mixing li uids, the combination of a tank,: a vertica cylinder within the tank which is open at both" ends and has its lower end a short distance above -the bottom of the tank, portions of screw threads within the lower (part only of the interior of the cylinder, an portions of screwthreads around the lower part, of its exterior,

-' the pitch of said screw-threads being opposite,

and means for drivin the cylinder with said screw-threads in a irection to cause the ,outer screw-threads todrive the liguid down- Wards and the inner screw-thra s to drive it upwards.

shaft, horizontal arms above the tank free to turn slowly around the vertical shaft, a vertical spindle carried by each arm, a vertical cylinder open at both ends mounted oneach {vertical spindle and having its lower end a 'short distance above the bottom of the tank,

ortions of screw-threads carried within the ower part of the exterior of the cylinder, and means for revolving the cylinder in a direction to cause the screw-threads to drive the liquid upwards/through the cylinder.

"HENRY SKINNER.

Witnesses:

H. D: JAMESON, F. L. RAND. 

